LTC3897IUHF#PBF

LINEAR TECHNOLOGY LTC3897IUHF#PBF DC-DC Controller, Synchronous Boost Step Up, 4.5V to 65V, 1 Output, 760kHz, QFN-38 New

The from is a PolyPhase synchronous boost controller with input/output protection in 38 pin QFN package. It is a synchronous boost DC to DC controller with surge stopper and ideal diode controller. The boost controller drives two N-channel power MOSFET stages out of phase to reduce input and output capacitor requirements, allowing the use of smaller inductors than single phase equivalent. Synchronous rectification reduces power loss and eases thermal requirements. The surge stopper controls the gate of an external N-channel MOSFET to protect against high voltage input transients and provides in-rush current control, overcurrent protection and output disconnect for the boost converter. The integrated ideal diode controller drives another N-channel MOSFET to replace a schottky diode for reverse input protection and voltage holdup or peak detection. It controls the forward voltage drop across the MOSFET and minimizes reverse current flow.

.

Input supply range from 4.5V to 65V up to 75V surge

.

Reverse input protection to -40V, output voltage up to 60V

.

In-rush current control, overcurrent protection and output disconnect for boost converter

.

Input voltage surge protection with adjustable clamp voltage

.

No external bootstrap diodes required, onboard ideal diode controller

.

Low quiescent current of 55µA and programmable frequency from 760KHz at RFREQ = 100K

.

2-phase operation reduces required input and output capacitance and noise

.

Input DC supply current of 1.32mA pulse skipping/forced continuous mode & shutdown current of 15µA

.

Adjustable gate drive level from 5V to 10V OPTI-DRIVE for logic level or standard threshold FETs

.

Operating temperature range from -40°C to 125°C